如何从页面级别获取父框架? [英] How to get parent frame from page level?

问题描述

我有一个带有框架和几页的窗口.当窗口加载时，框架导航到欢迎页面，当我单击欢迎页面内的按钮时，我希望父框架导航到另一个页面.为此，我需要从页面级别访问父框架，但我不知道如何执行此操作.我尝试了下面的代码，但它返回空值:

i have a window with a frame and few pages. When the window is loaded the frame is navigating to welcome page and when i click a button inside welcome page i want parent frame to navigate to another page. To do that i need to access parent frame from page level but i can't figure out how to do this. I tried code below but it's returning null:

private void myButton_click(object sender, RoutedEventArgs e)
{
  SecondPage secPage = new SecondPage();
  ((this.Parent) as Frame).Navigate(secPage);
}

我检查了 'this.parent' 返回的是什么，它是空的.如何获取父框架以便我可以从一个页面导航到另一个页面?

I checked what 'this.parent' is returning and it is null. How can I get parent frame so i can navigate from one page to another ?

推荐答案

页面也有一个名为 NavigationService 的属性.您可以使用此属性方便地在页面之间导航:

A Page also has a property called NavigationService. You can use this property for convenience to navigate between pages:

private void myButton_click(object sender, RoutedEventArgs e) {
  SecondPage secPage = new SecondPage();
  NavigationService.Navigate(secPage);
}

要访问父 Frame，您必须使用 VisualTreeHelper 向上走，然后找到 Frame.您可以搜索更多相关信息.无论如何，使用 NavigationService 属性会更好.

To access the parent Frame, you have to use VisualTreeHelper to walk up, and find the Frame. You can search more about it. Anyway using the NavigationService property is better.

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